🏷️ Basic Information

Make:

Harley-Davidson

Model:

FXWG

Year:

1980

Engine Type:

Shovelhead V-Twin

Engine Code:

Shovelhead

👋 Introduction

Description:

The 1980 Harley-Davidson FXWG Shovelhead was a significant model in Harley's lineup, representing the evolution of their big twin platform with the introduction of the cast aluminum lower legs and improved styling that would influence future designs. It aimed to capture riders seeking a blend of classic Harley power with a more modern, integrated appearance.

Competitors:

Competed against other American V-twin cruisers and emerging Japanese performance motorcycles. Its primary appeal was its iconic V-twin engine and the distinct Harley-Davidson riding experience.

Features:

Shovelhead engine, iconic 'cruiser' styling, 4-speed transmission, cast aluminum fork lowers, 16-inch rear wheel.

📋 Manual Details

Engine Systems:

Yes

Transmission Systems:

Yes

Electrical Systems:

Yes

Chassis And Suspension:

Yes

Brake Systems:

Yes

Fuel System:

Yes

Ignition System:

Yes

Bodywork And Trim:

Yes

Troubleshooting:

Yes

Estimated Pages:

Comprehensive (Exact PDF page count may vary)

Type:

Service and Repair Manual

Language:

English

Format:

PDF

📖 Manual Coverage

Engine Overhaul:

Complete engine teardown, inspection, and reassembly procedures for the Shovelhead engine.

Carburetor Service:

Detailed instructions for maintenance, adjustment, and repair of the Keihin CV carburetor (or relevant carburetor for the model year).

Ignition Timing And Adjustment:

Procedures for setting ignition timing, points gap, and condenser replacement.

Transmission Rebuild:

Step-by-step guide for servicing and rebuilding the 4-speed transmission.

Clutch Service:

Instructions for clutch adjustment, plate replacement, and primary drive maintenance.

Electrical Diagnostics:

Wiring diagrams, component testing, and troubleshooting for the entire electrical system.

Charging System:

Maintenance and repair of the alternator, voltage regulator, and battery.

Lighting And Accessories:

Service information for headlights, taillights, turn signals, and other electrical accessories.

Front Forks And Suspension:

Disassembly, maintenance, and assembly of the front fork assembly.

Rear Shock ABSorbers:

Service and adjustment procedures for rear shock absorbers.

Brake System Maintenance:

Front and rear brake caliper service, pad replacement, and fluid bleeding.

Wheel And Tire Service:

Information on wheel bearing maintenance and tire replacement.

Frame And Bodywork:

Inspection and minor repair procedures for the frame and body components.

Routine Maintenance:

Oil changes, filter replacement, spark plug checks, chain adjustment (if applicable), and general lubrication.

Diagnostic Troubleshooting:

Systematic approaches to identifying and resolving common mechanical and electrical issues.

Component Replacement:

Detailed instructions for replacing worn or failed components.

Tune-Up Procedures:

Comprehensive steps for performing a complete engine tune-up.

Torque Specifications:

Essential torque values for critical fasteners throughout the motorcycle.

Special Tool Recommendations:

Identification of specialized tools required for specific repair procedures.

Depth:

Comprehensive: Covers everything from basic routine maintenance to complete engine and transmission rebuilds, including detailed diagnostic procedures.

📊 Manual Specifications

Searchable Text:

Yes (typically for well-scanned PDFs)

Printable:

Yes

Resolution:

High-resolution scans suitable for screen viewing and printing.

Quality:

Digital PDF format, offering clarity and easy navigation.

Type:

N/A (Digital PDF)

Type:

N/A (Digital PDF)

⚙️ Engine Specifications

Engine Configuration:

Air-cooled, 45-degree V-twin

Engine Displacement:

80 cubic inches (1309 cc)

Bore X Stroke:

3.4375 in x 4.25 in (87.3 mm x 108.0 mm)

Compression Ratio:

8.1:1 (Typical)

Valve Train:

Overhead valves (OHV), pushrod actuated

Cylinder Heads:

Cast iron

Cylinder Block:

Cast iron

Horsepower:

Approx. 65-70 HP (at rear wheel, estimated)

Torque:

Approx. 70-75 ft-lbs (at rear wheel, estimated)

Fuel Delivery:

Single Keihin Constant Velocity (CV) carburetor (e.g., CV-40)

Fuel Type:

Unleaded gasoline, 87 octane (minimum recommended)

Oil Type:

Harley-Davidson 20W50 motorcycle oil or equivalent

Oil Capacity:

Approx. 3 quarts (2.8 liters) with filter change

Ignition Type:

Contact breaker points and condenser

Spark Plugs:

Champion H8C or equivalent

🔧 Transmission

Transmission Type:

4-speed, constant mesh

Clutch Type:

Wet, multi-plate

Primary Drive:

Double row chain, enclosed in primary chaincase

Final Drive:

Belt drive (typically 133-tooth belt)

Fluid Type:

Harley-Davidson Primary Chain Lubricant or equivalent SAE 50 motorcycle oil

Fluid Capacity:

Approx. 24 fluid ounces (0.7 liters)

📐 Dimensions

Wheelbase:

Approx. 62.5 inches (1587.5 mm)

Length:

Approx. 90 inches (2286 mm)

Seat Height:

Approx. 29 inches (736.6 mm)

Dry Weight:

Approx. 590 lbs (267.6 kg)

Fuel Capacity:

Approx. 3.5 gallons (13.2 liters)

🛡️ Safety Features

Crash Test Ratings:

Not Applicable (Motorcycle, pre-dates mandatory motorcycle safety ratings)

Braking System:

Dual disc front brakes, single disc rear brake (hydraulic actuation)

Lighting:

Halogen headlight, taillight, stop light, and turn signals.

Frame Construction:

Steel tube frame

Suspension:

Telescopic front forks with rubber gaiters, adjustable dual rear shock absorbers.

💡 Technology Features

System:

Basic; typically no integrated infotainment system. Relied on aftermarket radio installations.

🔧 Maintenance

First Service:

500 miles (800 km) - Oil change, primary chaincase check, check all fasteners.

Subsequent Oil Changes:

Every 2,500 miles (4,000 km) or 6 months, whichever comes first.

Primary Chaincase Oil Change:

Every 5,000 miles (8,000 km) or annually.

Spark Plug Replacement:

Every 5,000 miles (8,000 km) or as needed based on inspection.

Ignition Points Service:

Inspect and adjust every 2,500 miles (4,000 km). Replace as needed.

Brake Fluid Flush:

Every 12,000 miles (19,000 km) or 2 years.

Engine Oil Type:

SAE 20W50 motorcycle-specific oil (e.g., Harley-Davidson 20W50)

Primary Chaincase Fluid Type:

SAE 50 motorcycle oil or Harley-Davidson Primary Chain Lubricant

Brake Fluid Type:

DOT 4 hydraulic brake fluid

Fork Oil Type:

Harley-Davidson Type 'E' or Type 'B' fork oil, or equivalent (viscosity may vary based on rider preference and conditions, typically around 10W)

Oil Leaks:

Common due to aging seals and gaskets, particularly around the primary drive and transmission.

Carburetor Tuning:

CV carburetor can require periodic adjustment for optimal performance and fuel economy.

Electrical Connections:

Corrosion or looseness in wiring harnesses and connectors can lead to intermittent electrical issues.

Shifter Lever Play:

Wear in the shifter linkage can result in play or difficulty engaging gears.

Pushrod Tube Seals:

Leaking pushrod tube seals are a frequent concern on Shovelhead engines.

📚 Vehicle History

Brand Foundation:

Founded in 1903 in Milwaukee, Wisconsin, Harley-Davidson is one of the oldest motorcycle manufacturers in the world, known for its V-twin engines and distinctive cruiser styling.

Fxwg Development:

The FXWG (often referred to as 'Wide Glide') was an evolution of the FX Super Glide, incorporating styling cues and updated components to meet market demands for a more unified and visually appealing cruiser. The cast aluminum fork lowers were a significant aesthetic and functional update over previous models.

Shovelhead Era:

The Shovelhead engine, introduced in 1966, was Harley-Davidson's primary big twin engine for over two decades, powering models like the Electra Glide, Super Glide, and various custom configurations. The 1980 model represents the later stages of its development.

Manufacturing Location:

Milwaukee, Wisconsin, USA

Production Period:

The Shovelhead engine was produced from 1966 to 1984. The FXWG model was produced from 1980 to 1986.

🏆 Awards & Recognition

Title:

Iconic Cruiser Status

Description:

The FXWG Shovelhead is recognized by enthusiasts as a classic American motorcycle, representing a significant era in Harley-Davidson's history and a benchmark for cruiser design.